Good to hear from you again! I use the MotoBatt AGM battery...
12V bike battery sources
Stock battery FTZ14-BS Furakawa - dealer sourced most likely (expensive)
AGM MBTX12U 14AH
http://www.murphskits.com (I have this and it's working fine, no issues)
Shorai battery LFX21A6-BS12 Tender SHO-BMS01
Battery Stuff
http://www.batterystuff.com/powersports-batteries/sYTX14-BS.htmlMurph doesn't stock that battery anymore but you can source it at other vendors if you Google it.